Page-end signaling device



Sept. 1, 1931. v GALE 1,821,831

PAGE END SIGNALING DEVICE Filed Jun e 10,1929 2 Sheets-Sheet l I Q MM [1 Q U n Sept. 1, 1931. a l. GALE PAGE END SIGNALING DEVICE Filed June 10. 1929 Sheets-Sheet 2 Patented Sept. 1. 1931' EWAEI IIIGLISGALE, or a PATENT, OFFICE.

-- QNTARIO, CANADA PAGE-END SIGNALING DEVICE Application iuea June 10, 1929. Serial No. 369,859.

This invention relates to a page-end signaling device for typewriters and has for its principal object the provision of a mechanism which will operate to ring a sig- 7 nal bell upon movement of the line space lever after a pre-determined line of writing, adjacent the lower edge of the sheet of paper being used, has been completed.

A further object is the provision of a signaling device for typewriters, which will give an audible signal upon the operation of the line space lever after each succeeding line of writing, following a pre-determlne v line adjacent the lower edge of the sheet of paper being used, has been completed.

further object is the provision of a page-end signaling device for typewriters, the mechanism of which may be ad ustably set so as to cause an audible signal upon 3G movement of the line space lever after a predetermined line of writing, adjacent the lower edge of the sheet of paper bemg used,

- has been completed.

Fig. 1 1s a rear view of a typewriter carriage, parts being broken away to more clearly'disclose the preferred embodiment of my invention as applied thereto.

Fig. 2 is a left end view of the typewriter carriage, parts being broken away to more clearly illustrate the relative arrangement of o co-acting parts.

Fig. 3 is a sectional viewtaken on the line 3-3 of Fig. 1. Fig. 4 is a fragmentary top plan view of the right end of the typewriter carriage,

46 parts being broken away to more clearly illustrate the co-acting parts. H v

Fig. 5 is a side elevation view of the signal retarder.

' Fig. 6 is a rear view of part of the trip mechanism illustrating its relative position to the retarder, the latter being shown in section taken on the line 66 of Fig. 5.

The drawings forming a part of this application disclose the adaptation of the preferred embodiment of my invention as applied to an Underwood standard typewriter. With certain modifications within the scope of the appended claims, my pa end signaling device may be adapted or use with other types or makes of typewriters or other similar machines.

Like numerals of reference designate corresponding parts throughout the dilierent views.

5 and 6 are brackets supported from a bar A, which bar A extends across behind and supports the paper rest B. The ends of the bar A are suitably connected to the 'rear ends of the carriage ends C. The outer ends of these brackets are provided with transverse openings through which the rod 7 is rotably supported. 8 is an arm, one

end of which is fixedly connected on the end of the rod 7. The free end of this arm is bifurcated and is provided with a transverse pin on which a trig er 9 is pivotally mounted. 10 is a thrust nger, one end of which is connected to the rear end of the finger 10 extends through a suitable opening at the rear of the carriage end C and will be reciprocatedtherethrough on movement of theline space adjustment bar D by the line space lever E. The outer or free end of the thrust finger 10 is inclined downwardly and bent inwardly as atll, the inwardly bent portion being designed to be reciprocated in a plane to contact with the tip of the trigger 9 when in normal position. This bent portion 11 describes a cord intersecting through the arcual path of travel of the tip of the trigger 9 with the rod 7 as a radius point. The formation of the bifurcation in the arm 8 is such as to limit the pivotal movement inwardly of the tip end of the trigger 9. The lower end of the trigger 9 overbalances'the weight of the tip end thereofand the trigger 9 will normally return to the position as shown in full lines Fig. 2 after the bent end 11 of the thrust finger 10 returns to normal position as hereinafter referred to.

Carried on the bar A, I provide. a bearing plate 12 in which the trip lever 14 is rockably supported. The ends of the .trip lever 14 are bent at right angles to the central body portion, the end 14 extending downwardly under the paper rest B, while the end 14 extends upwardl and outwardly. The end 14 is looped bac upon itself as at 17. The paper rest B has an opening 18- formed therein to permit thelooped portion 17 to protrude therethrough. F is the platen around which I have shown a sheet of paper 19. Under normal circumstances, the sheet of paper 19 lies down flat against the upper face of the paper rest B and will prohibit the looped portion 17 of the end 14 to protrude through the opening 18. The end 14 is provided with an enlarged head 15, preferably of triangular shape. 16 is a staple, supported from the rod 7. The staple 16 is so positioned on the rod 7 as to register with the enlarged head 15.

Fixedly attached to the right end of the rod 7 is a striker arm 21, the shank portion of which is of flexible material. 22 is a tension spring coiled around the rod 7, having one end connected to the bracket 5 while the outer end is connected over the arm 21. The right end C has supported from the rear end thereof a detent 20, which extends across the path of travel of the striker arm 21, so that when the striker arm comes in contact therewith, the free end carrying the striker will resiliently contact with the bell 23 supported from the right end C.

When the sheet of paper 19 is in normal position contacting across the upper face of the paper rest B and partially rolled around the platen F, the looped portion 17 will be prohibited from extending through the opening 18. When the looped portion 17 is thus retained, the outer edge of the enlarged head 15 is in normal contact with the staple 16. When in this position 'and upon actuation of the line space lever, the thrust finger 10 is moved rear-wardly and engages .the tip of the trigger 9, causing the rod 7 to be partially rotated in the brackets 5 and 6. As soon as the bent end 11 passes out of the arcual path of travel of the tip of the trigger 9, the arm 8 will be returned to normal position (by means of the tension spring 22), the free end of the staple 16 contacting against the outer edge of the enlarged head 1 di will prevent the rod 17 from r0- tatmg suflicient to allow the striker 21 to ring the bell 23. As the typing is continued on the sheet of paper 19, it will be rolled line-after-line around the platen F until the end of the sheet passes down by the opening 18 in the paper rest B. When the sheet of paper is then next moved to a one-line-space distance through the actuation of the line space lever E, the staple 16 will be moved out of contact with the outer ed e of the enlarged head 15 when the rod 7 is rotated as hereinbefore described. This enlarged head 15 and the arm 14 being heavier than the arm 14 in the looped portion 17, the trip lever 14 will rock to the position shown in dotted lines in Fig. 3. In this position the looped portion 17 will protrude through the opening 18 and the enlarged head 15 will have moved downwardly sufiicient that the staple 16 may straddle the enlarged head 15. When the 'staple 16 is permitted to straddle the enlarged head 15, the rod 7 will be permitted to rotate sufficient to allow the striker to contact with the detent 20 and cause a signal audible to the operator, which will indicate that the end of the sheet of paper has gone by the opening 18. The opening 18 and the length of the arm 14 will be predetermined in relation to a predetermined number of lines or a space from the bottom of a sheet of paper, so that when the audible signal is given in the manner as just hereinbefore described, the operator will then be aware of the fact that she has only such a pre-determined number of lines or a space from the bottom of the page on which to write. Each successive operation of the line space lever E will cause a similar signal to be given until the next sheet of paper is inserted. When the next sheet of paper is inserted and the line space lever E operated to adjust the sheet of paper, the rod 7 will be rotated as hereinbefore described and when in backward rotated position, the staple 16 will move from its straddled position over the enlarged head 15. The pressure of the paper on the inwardly protruding looped portion 17 will immediately cause the rocking of the trip lever 14 in an opposite direction to that hereinbefore described and when thus rocked, the enlarged head 15 will be moved upward, so as to be in the path of travel of the staple 16 to limit the inward rotary movement of the rod 7. Y

Referring to Figs. 5 and 6, I provide a signal retarder designed to co-act with the enlarged head 15. The operator may set the retarder for indication of various pre-determined line spacing relative to the lower end of a sheet of paper. 24 is a casing reciprocally mounted on the rod 7 but in fixed rotary relationship thereto by means of the set screw 25, the end of which protrudes into the longitudinal slot in the rod 7 as shown in Figs. 5 and 6. 26 and 27 are shelf plates disposed in staggered relationship from the opposite side walls of the casing 24. 28 is a pin carried by and extending outwardly from the enlarged head 15 into the casing 24, the outer end of the pin 28 being normally positioned between the upper end 24 of the casing and the up rmost shelf plate 26. As soon as the en of the sheet of paper 19 passes the opening 18 and the staple 16 is released from contact with the 5 edge of the enlarged head 15, the pin 28 'will contact with a'nd'rest on the uppermost shelf plate 26. When the linespace lever is again actuated, the rod 7 will be rotated, carrying with it the staple 16 and the easing 24. As the casing moves with the rod 7 the pin 28 will drop from the uppermost shelf plate 26 to the u permost shelf plate .27 and on the return 0 the rod 7 to normal position in which the staple 16 contacts with 1 the outer end of the enlarged head 15, the pin 28 will drop to contact against the upper face of the next succeeding shelf plate 26. The pairs of. shelf plates are of various lengths. The uppermost pair of shelf plates 20 2627 extend the greatest length towards the enlarged head 15, while each succeedin pair of shelf plates 26-27 are of a reduce length corresponding to the distance between the notches 29 formed on the rod 7. 30 is a retainer member, one end of which is securely attached to the casing 24, while the other end extends outwardly therefrom and is resiliently retained in the notches 29. When the retainer member is in the notch 30 29, the outer end of the pin 28 will be out of contact with any of the shelf plates 26-27 and will be free to drop upon the first actuation of the line space lever E after the 'end of the paper has passed by the opening 18. When the retainermember 30 is in the notch 29', the uppermost pair of shelf plates 2627 will have been moved for contact with the end of the pin 28 and the dropping of the enlarged head 15 will be retarded for a one-line actuation of the line space lever E. Accordingly, when the retainer member 30 is moved to the notch 29, to the notch 29 and to the notch 29, the dropping of the enlarged head 15 will be retarded a two-line, three-line and four-line actuation of the line space lever before it may drop to allow the staple 16 to return and straddle the enlarged head 15 as hereinbefore described and permit the striker 21 to ring the bell 23;

The foregoing s ification and annexed drawin disclose t e referred embodiment controlled by a sheet of paper on the paper rest of said machine; s aid trip lever designed to normally retard the forward rotation of said rod; said trip lever designed to move to non-retarding position when the lower end of said paper is moved passed a pre-determined posltion on said paper rest; a signal; a means for tensionally retaining sai rod to rotate forwardly and said rod having a striker connected therewith for contacting with said signal when said rod is permitted to rotate forwardly'when said trip lever is in non-retarding position.

2. In combination with a'typewriter,.embodying a line space adjustment bar and means for reciprocating the same in a backward and forward direction, of an operating rod; means, operatively actuated by said bar, for rotating said rod baekwardly u on actuationof said bar in a backward direction; a trip lever, the operation of which is controlled by a sheet of paper on the paper rest of said machine; sald trip lever designed to normally retard the forward rotation of said rod; said trip lever designed to move to non-retarding position when the lower end of said paper is moved past a predetermined position on said paper rest; a

signal; a means for tensionally retaining said rod to rotate forwardly, said rod having a striker connectedtherewith for contacting with. said signalwhen said rod is permitted to rotate forwardly when, said trip lever is in non-retarding osition and an adjustable means for retar ing the 'forward rotation of said rod to contact said. striker with said signal, according to a predetermined number of line-movements actuated by said adjustment bar after the lower of my invention, but it is to be understood 7 that minor changes may be vresortedto in the commercial adaptation of my invention without departing from the scope of the invention as hereinafterTclaimed What I claim as new is:

4 1. In combination with a typewriter, em-

bod a line space adjustment bar and means or reciprocating the same in a backward and forward direction, of an operating rod; means, operatively actuated'by said bar, for rotating-said rod backwardly upon actuation of said bar in a backward direc- 65 tion; a trip lever, the operation of which is end of said paper has moved past said predetermined position on said paper rest.

In testimony whereof, I afiix m signature. EWART INGLI GALE. 

